Shenandoah River
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The Shenandoah River is the principal tributary of the Potomac River, 55.6 miles (89.5 km) long with two forks approximately 100 miles (160 km) long each, in the U.S. states of Virginia and West Virginia. The river and its tributaries drain the central and lower Shenandoah Valley and the Page Valley in the Appalachians on the west side of the Blue Ridge Mountains, in northwestern Virginia and the Eastern Panhandle of West Virginia. There is a hydroelectric plant along the Shenandoah river constructed in 2014 by Dominion.
Crossing the Shenandoah River in Harpers Ferry, West Virginia
Dream Lake, inside Luray Caverns
Moonlight on the Shenandoah, engraving by J.D. Woodward
The South Fork Shenandoah River, with Massanutten Mountain in the background, as viewed from an overlook in Shenandoah River State Park
Tributary
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A tributary, or an affluent, is a stream or river that flows into a larger stream, river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which they flow, drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean.
Nam Khan flows into the Mekong at Luang Prabang in Laos.
At Harpers Ferry, West Virginia, looking downstream, the Shenandoah River (bottom right) meets the Potomac River, which flows from bottom left to top right, making the Shenandoah a right tributary of the Potomac.
![The Mekong is a trans-boundary river, originating in the Tibetan Plateau. Its upper tributary river systems (e.g. ngom chu [zh]) are restricted to nar](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Mekongbasin.jpg/500px-Mekongbasin.jpg)
The Mekong is a trans-boundary river, originating in the Tibetan Plateau. Its upper tributary river systems (e.g. ngom chu [zh]) are restricted to narrow gorges, but the tributaries that feed its lower reaches (e.g. the Mun River) cover larger areas.